Questions tagged [preprocessing]
Preprocessing is a relative term that usually refers to simpler operations applied to improve the operation of a more complex algorithm.
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Fiber Photometry (Fluorescence) Signal Preprocessing through Source Separation and Baseline Correction
I am working on preprocessing fiber photometry data. The data collection involves inserting fibers into an animal, where the reflection of specific wavelengths of light is captured. We collect two ...
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What is the best approach when training and HDR model with LDR data?
I am working on this project "EMLight".
Data: HDR Panoramic Photos
y: Illumination Map of the Panorama
X: HDR Croppings from the Panorama
I want to make this project work with LDR photos, ...
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CWT: selection of scales and filtering
I am using CWT to obtain scalograms of ECG signals as the one below:
In my research, most articles contain a pre-processing step before performing CWT (that usually includes signal normalization and ...
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Check whether signal is periodic
I have a signal with multiple frequencies. The frequency changes depending on the amount of air flowing through the fuel snap. The signal resembles a square wave ranging from $0.4$ to $4.5$ Volts and ...
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Creating Triangle Filters for Smoothing using Python
The 'binning' process consists in summing the energies (squared magnitude) within groups of adjacent FFT values. This will give you the total energy in a set of disjoint frequency bands.
A more ...
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Auditory models which are not human
I am doing a machine learning project and I'm interested in the different pre-processing techniques which can be applied to audio data. In particular, I am interested in comparing a human auditory ...
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magnitude spectrum
I have an ECQ signal of 360 Hz sampling frequency. I used an FFT to extract the frequency spectrum of my signal. Now I don't know exactly how to interpret this plot. How can I know the noise from ...
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Verification of intermediate outputs in Signal processing chain of FPGA
I have two ADC interfaces with FPGA and 32-bit processed output data from FPGA.
I have an IO signals to verify the Inputs and Outputs of FPGA.
But I dont have any test points to verify the ...
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Peak Sharping of multi-signal data
I have multi-signal data and as a processing step want to apply peak sharping of signal as shown in fig below.
is there any way I can achieve this in python ?
Literature :Paper 1(Peak sharping section ...
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Digital Signal Quantized Processor Complexity
In “traditional” digital signal processing, the complexity is computed as a number of multiplication the operation requires, e.g. the computation of the N-point DFT via the decimation-in-frequency FFT ...
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How to validate that an audio algorithm result is independent of microphone device?
I have a machine learning algorithm that takes speech sample audio recordings collected from mechanical Turk. During processing it was shown that some audio from certain OS/microphone devices have ...
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Pre-Processing Wi-Fi Channel State Information (CSI) Data
I was successfully able to collect some CSI data using the existing tool(s) on GitHub (https://github.com/StevenMHernandez/ESP32-CSI-Tool). The CSI data is a pair of imaginary and real number which ...
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My 3x3 Weighted Median Filter doesn't seem to be improving my image quality
In order to reduce noise in my training dataset,I attempted a WMF whose weights are shown in a 2-D array as follows(values finally get normalized by division by 15:
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How to detect offset that changes along time in a signal?
I have an issue that has to do with detrending a signal. First, it seems my signals behaves a little unusual (for me, I think). Some signals starts with a quite large offset, then it seems to ...
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Baseline correction for continuous EEG signals
I'm new to the topic so forgive the trivial question.
I am trying to understand data preprocessing for EEG signals. As I understand, after recording continuous EEG signals, they should be band-pass ...
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